A novel decision-directed receiver for detection of GPM signals

A novel Decision-Directed Receiver (DDR) has been arrived at based' on heuristic considerations for coherent demodulation of arbitrary Continuous Phase-Modulated (OPM) constructions received over AWGN channel. The complexity of the DDR is a linear function of the observed symbol intervals. However, repeated processing of the received (signal + noise) waveform segments is required. The error probability analysis of the DDR for a subclass of CPM known as CPFSK is presented. It is noted that the low-complexity DDRs are attractive by virtue of their superior error performance relative to the well known Average Matched Filter (AMF) receivers, at least for certain modulation indices, for example h = O.S.